From Wikipedia, the free encyclopedia

Fecundism (word derived from fecundity) is the politics
of willfully promoting high birth rate among a group for the sake of
enlarging its numbers related to other groups and, consequently,
its political influence.

In practice, it is difficult to prove whether a group is
conducting fecundism, or if high birth rate is natural consequence
of a group's beliefs or actions (and would therefore exist even if
it would not result in higher political influence). The religious
groups involved most often have long-standing principles and family
structures that predate any democracies in which they may take part
(although some, such as the Quiverfull movement, openly acknowledge
it, and use Psalm 127:5 in its justification). Nonetheless, some
groups commonly claimed to practice fecundism include:

Fecundism can change the dynamics of a democracy, as the one man, one
vote principle favours larger groups over smaller, and so the
fecundism is certain to give larger and larger influence to the
group which chooses it.